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A Highly Stretchable Nanofiber-Based Electronic Skin with Pressure‑, Strain‑, and Flexion-Sensitive Properties for Health and Motion Monitoring
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posted on 2017-09-11, 00:00 authored by Kun Qi, Jianxin He, Hongbo Wang, Yuman Zhou, Xiaolu You, Nan Nan, Weili Shao, Lidan Wang, Bin Ding, Shizhong CuiThe
development of flexible and stretchable electronic skins that can
mimic the complex characteristics of natural skin is of great value
for applications in human motion detection, healthcare, speech recognition,
and robotics. In this work, we propose an efficient and low-cost fabrication
strategy to construct a highly sensitive and stretchable electronic
skin that enables the detection of dynamic and static pressure, strain,
and flexion based on an elastic graphene oxide (GO)-doped polyurethane
(PU) nanofiber membrane with an ultrathin conductive poly(3,4-ethylenedioxythiophene)
(PEDOT) coating layer. The three-dimensional porous elastic GO-doped
PU@PEDOT composite nanofibrous substrate and the continuous self-assembled
conductive pathway in the nanofiber-based electronic skin offer more
contact sites, a larger deformation space, and a reversible capacity
for pressure and strain sensing, which provide multimodal mechanical
sensing capabilities with high sensitivity and a wide sensing range.
The nanofiber-based electronic skin sensor demonstrates a high pressure
sensitivity (up to 20.6 kPa–1), a broad sensing
range (1 Pa to 20 kPa), excellent cycling stability and repeatability
(over 10,000 cycles), and a high strain sensitivity over a wide range
(up to approximately 550%). We confirmed the applicability of the
nanofiber-based electronic skin to pulse monitoring, expression, voice
recognition, and the full range of human motion, demonstrating its
potential use in wearable human-health monitoring systems.
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pressure sensitivityskin offernanofibrous substratecoating layerself-assembled conductive pathwaypulse monitoringstrain sensitivityStretchable Nanofiber-Based Electronic SkinMotion Monitoringnanofiber membranegraphene oxideskin sensorPEDOTcontact sitesnanofiber-basedmotion detectiondeformation spacespeech recognitioncycling stabilityFlexion-Sensitive Propertiesfabrication strategywearable human-health monitoring systemsvoice recognitionPU
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